3com 8807 사용자 설명서

Although the Switch 8800 Family has undergone a comprehensive factory test 
before delivery, an improper installation may cause problems. This chapter 
describes how to troubleshoot the Switch 8800 Family.

If the system running properly, when you power on the switch, you will see the 
boot information on the console terminal. If the switch is configured incorrectly, 
the console terminal may display illegible output or nothing at all.

If the console does not display anything after you power on the switch, check that 
the:

■

Power system is working normally.

■

Fabric is working normally.

■

Console cable is connected to the console port on the fabric.

If you find no issues with these items, the problem is most likely one of the 
following:

■

The console cable is not connected to the right serial port. That is, the port in 
use is not the one configured on the terminal.

■

There are console terminal parameter errors. (According to the parameter 
setting requirements, you should set the baud rate to 9600, data bits to 8, 
parity to None, stop bits to 1, flow control to None, and select VT100 as your 
terminal emulation protocol.)

■

The console cable is not in good condition.

If the terminal displays illegible characters, it is most likely a console terminal 
setting error. Check that you have set the baud rate to 9600, data bits to 8, parity 
to None, stop bits to 1, flow control to None, and select VT100 as your terminal 
emulation protocol.

Table 75   LEDs on the PSU

INPUT 

It stays ON if the power input is normal and the PSU switch is at the ON position. 
It stays OFF if the power input has failed or if there is no power input at all. 

OUTPUT 

It stays ON if the power output is normal, otherwise it is OFF. 

FAIL 

It stays ON if the PSU has failed, otherwise it is OFF.